Process of making crank-shafts.



W. I. BROOK.

PROCESS OF MAKING GBANK SHAFTS.

APPLICATION FILED NOV. '1, 1906.

954,923, Patenfied Apr. 12, 1910.

Fig. 1

WITNESSES: \NVENTOR a citizen of the United WALTER I. BROOK, OF ERIE,PENNSYLVANIA.

PROCESS OF MAKING CRANK-SHAPES;

Specification of Letters Patent.

Patented Apr. 12, 1910.

Application filed November 7, 1906. Serial No. 342,885.

I To all whom it may concern:

Be it known that- I WALTER I. Bnoex, States, residing at Erie, in thecounty of Erie and State of Pennslylvania, have invented-a new anduseful rocess for Making Crank-Shafts, which invention is describedandset forth in and by the following specification and the accompanyingdrawing;

This invention relates to a process for making a metal forging for crankshafts by the welding together of thin pieces of metal, of such outlmethat when assembled together they form a shape similar to the forging tobe produced.

I'describe the process and illustrate its a phcation to a forgin for anengine crank aft by means of the awin in which- 'Fi re 1 is a view of asing e piece of thin meta in outline of a shape similar to alongitudinal section of the crank shaft Fig. 3 on a center line cuttingboth the center of the shaft and crank pin. Fig. 2 shows a number ofthese thin pieces assembled ready for heating, welding and forming tothe deslred shape. Fig. 3 shows the completed shaft forging.

Similar characters refer to similar parts throughout the several views.

metal, of similar outline to the finished shaft forging, as described;in this instance a number of similar pieces 1 are assembled together, asshown by 2, Fig. 2, a thin layer of pulverized borax or other flux beingplaced between each layer to facilitate the welding together of the.several piecesinto \a solid mass.

The assembled pieces may beclamped to-. gather to facilitate handling orbe bound I the completed article, buil The piece 1, Fig. 1 is shapedfrom sheet together by bands; I prefer however to dispense with suchbands or clamps excepting their use be absolutely necessary.

The assembled pieces or form 2 after preparation as described, issubjected to a temperature necessary to bring the entire form to awelding heat, preferably in a welding furnace with a clean flame; uponreaching a welding heat, the form is welded into a solid mass and giventhe finished shape shown by Fig. 3; by means ofza reciprocating press orhammer provided with suitable diesor molds.

I am aware that forgings are at present made by building up a series ofbars, or what is known in the art as fagots, these being welded togetherto form mto forgm I am aware that fiat strips of metal are welded toirregular shapes, as in the welding of tool steel cutting faces to metalof other quality; also that pieces of what is known as blister steel arewelded together to reduce shear steel.

atIclaimis:

The within described process of making crank shafts which consists instamping out thin sheets of metal having the outline of into the form ofthe article, heating the said sheets to a uniform welding heat, andsimultaneously welding and forging said sheets. In testimony whereof Ihave hereunto signed my name to this specification in the Eresence oftwo subscribing witnesses, at rie, Pa., the 3rd da of November, 1906. W'rER I. BROCK. Witnesses:

W. J. YOUNG, A. K. Bnnmm).

ing said sheets

